Add header files that were missing from BUILD.gn.

base/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # HOW TO WRITE CONDITIONALS IN THIS FILE
 # ======================================
 #
 # In many other places, one would write a conditional that expresses all the
 # cases when a source file is used or unused, and then either add or subtract
 # it from the sources list in that case
@@ skipping 348 matching lines @@
     "files/scoped_file.h",
     "files/scoped_temp_dir.cc",
     "files/scoped_temp_dir.h",
     "format_macros.h",
     "gtest_prod_util.h",
     "guid.cc",
     "guid.h",
     "hash.cc",
     "hash.h",
     "id_map.h",
+    "ios/block_types.h",
     "ios/crb_protocol_observers.h",
     "ios/crb_protocol_observers.mm",
     "ios/device_util.h",
     "ios/device_util.mm",
     "ios/ios_util.h",
     "ios/ios_util.mm",
     "ios/ns_error_util.h",
     "ios/ns_error_util.mm",
     "ios/scoped_critical_action.h",
     "ios/scoped_critical_action.mm",
@@ skipping 2112 matching lines @@
 }
 
 fuzzer_test("base_json_correctness_fuzzer") {
   sources = [
     "json/correctness_fuzzer.cc",
   ]
   deps = [
     ":base",
   ]
 }